C2 Quadratics Flashcards
1
Q
Why we CTS?
A
Solve quadratics
Sketching graphs
Prove a function is positive or negative
Integration
2
Q
Turning point in CTS equation
A
(-a,b)
3
Q
What do u have to be careful with when dividing an equation?
A
U can always divide by a number, but never by x because that’s when you then loss solutions
4
Q
How do u find the roots of an equation?
A
Can u factorise easily
If not, can u complete the square (putting f(x)=0)
Use of discriminant to identify what type of roots u have.
5
Q
What’s the discriminant
A
b squared -4ac
6
Q
What will the discriminant be if it has no real roots
A
Less than 0
7
Q
What will the discriminant be if it has one reapted root
A
Equal 0
8
Q
What will the discriminant be if it has 2 distinct real roots
A
Greater than 0
